---
product_id: 334544109
title: "RioRand (TM) 12V-40V 10A PWM DC Motor Speed Controller w/ Knob--High Efficiency, High Torque, Low Heat Generating with Reverse Polarity Protection, High Current Protection"
brand: "riorand"
price: "€ 44.90"
currency: EUR
in_stock: false
reviews_count: 5
category: "Rio Rand"
url: https://www.desertcart.sk/products/334544109-riorand-tm-12v-40v-10a-pwm-dc-motor-speed-controller
store_origin: SK
region: Slovakia
---

# 12V-40V wide voltage range Reverse polarity protection Low heat generation RioRand (TM) 12V-40V 10A PWM DC Motor Speed Controller w/ Knob--High Efficiency, High Torque, Low Heat Generating with Reverse Polarity Protection, High Current Protection

**Brand:** riorand
**Price:** € 44.90
**Availability:** ❌ Out of Stock

## Summary

> ⚙️ Master your motor’s pace with power and protection!

## Quick Answers

- **What is this?** RioRand (TM) 12V-40V 10A PWM DC Motor Speed Controller w/ Knob--High Efficiency, High Torque, Low Heat Generating with Reverse Polarity Protection, High Current Protection by riorand
- **How much does it cost?** € 44.90 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/334544109-riorand-tm-12v-40v-10a-pwm-dc-motor-speed-controller)

## Best For

- riorand enthusiasts

## Why This Product

- Trusted riorand brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Cool Under Pressure:** Engineered for low heat generation, ensuring reliable performance without overheating.
- • **Compact & Lightweight:** At just 59 grams, it fits effortlessly into any setup without bulk or fuss.
- • **Built-in Safety Shields:** Reverse polarity and high current protections safeguard your motor and controller from damage.
- • **Precision Speed Control:** Smoothly adjust motor speed with an intuitive knob for perfect torque every time.
- • **Robust Voltage Compatibility:** Operates seamlessly across 12V to 40V, empowering versatile industrial and DIY applications.

## Overview

The RioRand 12V-40V 10A PWM DC Motor Speed Controller offers precise speed adjustment with a user-friendly knob, supports a broad voltage range for versatile use, and includes essential protections like reverse polarity and high current safeguards. Its efficient design minimizes heat generation, making it a reliable, compact solution for professional and hobbyist motor control needs.

## Description

RioRand (TM) 12V-40V 10A PWM DC Motor Speed Controller w/ Knob-High Efficiency, High Torque, Low Heat Generating with Reverse Polarity Protection, High Current Protection : desertcart.in: Industrial & Scientific

Review: 問題なく作動 - 出力24V6.25AのACアダプタから中継させて、同じくdesertcartで購入したミニ電動ベルトサンダーに使用。 そのままでは回転数が高すぎて使い勝手が悪かったのだが、うまい事回転数調整ができるようになりました。 問題があるとすれば「裸」であるということだが、適当な大きさのタッパーウェア等に入れ、放熱用の穴をあけて使えば問題ないだろう。
Review: Top Qualität und Preis - Das Gerät funktionierte auf Anhieb prima ! Habe es mit verschiedenen Motoren und veränderlichen Spannungen getestet . Also bei diesen Preis unschlagbar ! Ein kleiner Nachteil , es wurde ohne Begleitschreiben oder Beschreibung zugestellt ! Aber bei diesen Preis kann eigentlich nichts passieren.

## Features

- energy efficient

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B007TH4EN6 |
| Brand | RioRand |
| Brand Name | RioRand |
| Country of Origin | USA |
| Customer Reviews | 4.1 out of 5 stars 580 Reviews |
| Global Trade Identification Number | 00645195917568 |
| Item Weight | 59 Grams |
| Manufacturer | ac |
| UPC | 645195917568 619636102455 |
| Unit Count | 1.0 Count |
| Voltage | 12 Volts |

## Product Details

- **Brand:** RioRand
- **Global Trade Identification Number:** 00645195917568
- **Item Weight:** 59 Grams
- **UPC:** 645195917568 619636102455
- **Voltage:** 12 Volts

## Images

![RioRand (TM) 12V-40V 10A PWM DC Motor Speed Controller w/ Knob--High Efficiency, High Torque, Low Heat Generating with Reverse Polarity Protection, High Current Protection - Image 1](https://m.media-amazon.com/images/I/718ncGYNzZL.jpg)
![RioRand (TM) 12V-40V 10A PWM DC Motor Speed Controller w/ Knob--High Efficiency, High Torque, Low Heat Generating with Reverse Polarity Protection, High Current Protection - Image 2](https://m.media-amazon.com/images/I/71tYD49UzFL.jpg)
![RioRand (TM) 12V-40V 10A PWM DC Motor Speed Controller w/ Knob--High Efficiency, High Torque, Low Heat Generating with Reverse Polarity Protection, High Current Protection - Image 3](https://m.media-amazon.com/images/I/71EN2Csq45L.jpg)
![RioRand (TM) 12V-40V 10A PWM DC Motor Speed Controller w/ Knob--High Efficiency, High Torque, Low Heat Generating with Reverse Polarity Protection, High Current Protection - Image 4](https://m.media-amazon.com/images/I/71geZBc9tbL.jpg)
![RioRand (TM) 12V-40V 10A PWM DC Motor Speed Controller w/ Knob--High Efficiency, High Torque, Low Heat Generating with Reverse Polarity Protection, High Current Protection - Image 5](https://m.media-amazon.com/images/I/618ivwE7+pL.jpg)

## Questions & Answers

**Q: is there any on/off switch in this?**
A: there is not on/off switch

**Q: I have a Battery is UB1250 12VDC 5Ah and connect to Fan that is 12DC 3.90A, 
is your item does the same application as Rheostat? if this is Not the right One?
which one you recommend please I look forward to your reply.**
A: It is similar in function to a rheostat, however, it does not waste energy by dropping the current across a resistor. This devise uses Pulse Width Modulation. If you are not familiar with this function, it basically chops the voltage in order to regulate the current output. You will be able to control the fan speed, without loosing current through a resistor in a rheostat and wasting your battery. I use it to control 12 and 24 volt wiper motors for animatronic devices. I use power supplies instead of batteries and have digital meters for output voltage, current, and motor rpm feedback by attaching a 10 tooth sprocket to the motor shaft and sensing by means of PNP proximity sensor. All of this gives me the ability to monitor and control functions of the motor quite precisely. You can also purchase versions of this controller that allow PWM control of the speed instead of the potentiometer which will then allow programmed speed patterns with a micro controller such as Arduino. This will be my next project.

**Q: Are there ports to screw the wires in or do they need to be soldered on?**
A: There are four screw ports on the side opposite the controller knob.  A pair for +/- power and another for motor.  They are clearly marked on the under side of the board.

**Q: How can I connect this to an Arduino to control a 12V motor?**
A: I did it the brute-force way.  I drilled a hole in the knob and inserted the shaft of a servo.  I then controlled the servo via the Arduino.  Not very elegant, to be sure, but nonetheless, effective.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 問題なく作動
*by 帝***部 on 9 June 2024*

出力24V6.25AのACアダプタから中継させて、同じくAmazonで購入したミニ電動ベルトサンダーに使用。 そのままでは回転数が高すぎて使い勝手が悪かったのだが、うまい事回転数調整ができるようになりました。 問題があるとすれば「裸」であるということだが、適当な大きさのタッパーウェア等に入れ、放熱用の穴をあけて使えば問題ないだろう。

### ⭐⭐⭐⭐⭐ Top Qualität und Preis
*by R***M on 5 November 2014*

Das Gerät funktionierte auf Anhieb prima ! Habe es mit verschiedenen Motoren und veränderlichen Spannungen getestet . Also bei diesen Preis unschlagbar ! Ein kleiner Nachteil , es wurde ohne Begleitschreiben oder Beschreibung zugestellt ! Aber bei diesen Preis kann eigentlich nichts passieren.

### ⭐⭐⭐⭐⭐ Works great. gives smooth speed control of DC motor.
*by K***C on 28 September 2014*



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**Shop now:** [https://www.desertcart.sk/products/334544109-riorand-tm-12v-40v-10a-pwm-dc-motor-speed-controller](https://www.desertcart.sk/products/334544109-riorand-tm-12v-40v-10a-pwm-dc-motor-speed-controller)

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-02-27*